Temperature control method and device of liquid cooling energy storage system

Abstract

The invention provides a temperature control method and device of a liquid cooling energy storage system. The method comprises the steps that under the condition that the liquid cooling energy storage system is in a standing state, the outdoor environment temperature in a future preset period is determined according to weather data in the future preset period; according to the outdoor environment temperature, the average refrigeration power of the liquid cooling unit in a future preset period is determined; according to the average refrigeration power of the liquid cooling unit in the future preset period, an initial temperature target value of battery charging and discharging is determined; under the condition that the liquid cooling energy storage system is in the charging and discharging state, the maximum theoretical refrigerating capacity of the liquid cooling unit in the current adjustment period is obtained according to the environment temperature in the current adjustment period; and according to the maximum theoretical refrigerating capacity of the current adjusting period, the liquid supply temperature target value of the next adjusting period is calculated. By means of the scheme, the initial charging and discharging temperature of the battery and the liquid supply temperature of the liquid cooling unit are dynamically adjusted, and it is ensured that the battery temperature of the battery in the charging and discharging state is controlled within the ideal range.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-cooled energy storage systems, and in particular to a temperature control method and device for a liquid-cooled energy storage system. Background Art

[0002] With the development of the energy storage industry, the integration of energy storage systems is becoming higher and higher, and the power density is also increasing. Therefore, the thermal management system in the energy storage system faces various challenges. When the thermal load of the battery increases and the allowable design space of the thermal management system is limited, the thermal management system usually faces the problem that the cooling capacity is difficult to meet the heat dissipation requirements of the energy storage system. Especially when the ambient temperature is high, the cooling capacity of the thermal management system will also be reduced, resulting in a significant increase in the risk of over-temperature of the battery temperature.

[0003] However, when existing thermal management systems use liquid cooling technology to control the battery temperature of energy storage systems, they often do not consider the limited allowable design space of the liquid cooling system, resulting in insufficient cooling capacity, and the high ambient temperature, which causes the cooling capacity of the liquid cooling system to be reduced. This will cause the batteries in the energy storage system to have the risk of overheating during charging and discharging.

[0004] In the case of insufficient cooling capacity of the liquid cooling system and high ambient temperature, there is currently no effective solution for how to control the battery temperature of the batteries in the energy storage system during charging and discharging within an ideal range. Summary of the invention

[0005] The purpose of the present application is to provide a temperature control method and device for a liquid-cooled energy storage system, which ensures that the battery temperature of the battery in the charging and discharging state is controlled within an ideal range by dynamically adjusting the initial charging and discharging temperature of the battery of the liquid-cooled energy storage system and the liquid supply temperature of the liquid cooling unit.

[0006] The present application provides a temperature control method for a liquid-cooled energy storage system which is implemented as follows:

[0007] A temperature control method for a liquid-cooled energy storage system, comprising:

[0008] When the liquid-cooled energy storage system is in a static state, obtain weather data within a preset period in the future;

[0009] Determine the outdoor ambient temperature within a future preset period based on the weather data;

[0010] According to the outdoor ambient temperature, obtaining a change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period;

[0011] Determine the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time;

[0012] Obtain the average heat generation power and temperature target value of the battery in the liquid-cooled energy storage system;

[0013] Determine the initial temperature target value of the battery charging and discharging according to the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery and the temperature target value of the battery;

[0014] The temperature of the battery in the liquid-cooled energy storage system is regulated according to the initial temperature target value of charging and discharging.

[0015] In one embodiment, according to the outdoor ambient temperature, obtaining a change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period includes:

[0016] Obtaining cooling capacity test data of the liquid cooling unit at different ambient temperatures;

[0017] Fitting the cooling capacity test data of the liquid cooling unit at different ambient temperatures to obtain a target fitting curve;

[0018] Determining the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature according to the target fitting curve;

[0019] According to the outdoor ambient temperature in a future preset period, and the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature, the change trend of the maximum cooling power of the liquid cooling unit over time in the future preset period is determined.

[0020] In one embodiment, determining the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time includes:

[0021] The average cooling power of the liquid cooling unit in the future preset period is calculated according to the following formula:

[0022]

[0023] in, is the average cooling power of the liquid cooling unit in the future preset period, Δt is the duration of the preset period, t is time, and Q1(t) is the changing trend of the maximum cooling power of the liquid cooling unit with time t.

[0024] In one embodiment, the initial temperature target value of the battery charging and discharging is determined according to the average cooling power of the liquid cooling unit in a future preset period, the average heat generation power of the battery, and the temperature target value of the battery, including:

[0025] Get the total heat capacity and total mass of the battery;

[0026] According to the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery, the temperature target value of the battery, the total heat capacity of the battery and the total mass of the battery, the initial temperature target value of the battery charging and discharging is calculated according to the following formula:

[0027]

[0028] Among them, T0 is the initial temperature target value of battery charging and discharging, is the average cooling power of the liquid cooling unit in the future preset cycle, Q2 is the average heat generation power of the battery, T1 is the target temperature value of the battery, C is the total heat capacity of the battery, M is the total mass of the battery, and Δt is the duration of the preset cycle.

[0029] In one embodiment, the temperature control method of the liquid-cooled energy storage system further includes:

[0030] When the liquid-cooled energy storage system is in a charging and discharging state, the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system are detected in real time;

[0031] According to the ambient temperature of the current adjustment period, obtaining the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment period;

[0032] Calculating a target value of the liquid supply temperature for the next adjustment cycle according to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system;

[0033] In the next adjustment cycle, the liquid cooling unit is controlled to cool according to the calculated target value of the liquid supply temperature in the next adjustment cycle.

[0034] In one embodiment, the target value of the liquid supply temperature of the next adjustment cycle is calculated according to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system, including:

[0035] Obtaining thermal resistance between a battery of a liquid-cooled energy storage system and a coolant of a liquid-cooled unit of the liquid-cooled unit;

[0036] According to the maximum theoretical cooling capacity of the current adjustment cycle, the battery temperature of the liquid-cooled energy storage system, and the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit, the target value of the liquid supply temperature of the next adjustment cycle is calculated according to the following formula:

[0037] T' out =T bat -Q max ×R

[0038] Among them, T' outis the target value of the liquid supply temperature in the next adjustment cycle, T bat is the battery temperature of the liquid-cooled energy storage system, Q max is the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment cycle, and R is the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit.

[0039] A temperature control device for a liquid-cooled energy storage system, comprising:

[0040] The first acquisition module is used to acquire weather data within a future preset period when the liquid-cooled energy storage system is in a static state;

[0041] A first determination module, used to determine the outdoor ambient temperature within a future preset period according to the weather data;

[0042] A second acquisition module is used to obtain a change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period according to the outdoor ambient temperature;

[0043] A second determination module is used to determine the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time;

[0044] A third acquisition module is used to obtain the average heat generation power and temperature target value of the battery in the liquid-cooled energy storage system;

[0045] The third determination module is used to determine the initial temperature target value of the battery charging and discharging according to the average cooling power of the liquid cooling unit in a future preset period, the average heat generation power of the battery and the temperature target value of the battery;

[0046] The first control module is used to control the temperature of the battery in the liquid-cooled energy storage system according to the initial temperature target value of the charging and discharging.

[0047] In one embodiment, the temperature control device of the liquid-cooled energy storage system further includes:

[0048] A detection module, used for detecting the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system in real time when the liquid-cooled energy storage system is in a charging and discharging state;

[0049] A fourth acquisition module, used for acquiring the maximum theoretical cooling capacity of the current adjustment period of the liquid cooling unit according to the ambient temperature of the current adjustment period;

[0050] A calculation module, used to calculate a target value of a liquid supply temperature in a next adjustment cycle according to a maximum theoretical cooling capacity of the current adjustment cycle and a battery temperature of the liquid-cooled energy storage system;

[0051] The second control module is used to perform refrigeration control on the liquid cooling unit in the next adjustment cycle according to the calculated target value of the liquid supply temperature in the next adjustment cycle.

[0052] An electronic device comprises a processor and a memory for storing instructions executable by the processor, wherein the steps of the above method are implemented when the processor executes the instructions.

[0053] A computer-readable storage medium stores a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0054] The temperature control method and device of the liquid-cooled energy storage system provided in the present application obtain weather data within a future preset period when the liquid-cooled energy storage system is in a static state; determine the outdoor ambient temperature within a future preset period based on the weather data; obtain the maximum cooling power of the liquid cooling unit of the liquid-cooled energy storage system in the future preset period based on the outdoor ambient temperature; determine the average cooling power of the liquid cooling unit in the future preset period based on the maximum cooling power over time; determine the initial temperature target value of the battery charging and discharging based on the average cooling power of the liquid cooling unit in the future preset period, the average heat generation power of the battery and the temperature target value of the battery. When the liquid-cooled energy storage system is in a charging and discharging state, the ambient temperature of the current adjustment period and the battery temperature of the liquid-cooled energy storage system are detected in real time; the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment period is obtained based on the ambient temperature of the current adjustment period; the target value of the liquid supply temperature for the next adjustment period is calculated based on the maximum theoretical cooling capacity of the current adjustment period and the battery temperature of the liquid-cooled energy storage system. The above scheme can achieve the purpose of dynamically adjusting the initial charging and discharging temperature of the battery of the liquid-cooled energy storage system and the liquid supply temperature of the liquid cooling unit, ensuring that the battery temperature when the battery is in the charging and discharging state is controlled within an ideal range. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of this specification, the drawings required for use in the embodiments will be briefly introduced below. The drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 It is a method flow chart of an embodiment of the temperature control method of the liquid-cooled energy storage system provided by the present application when the liquid-cooled energy storage system is in a static state;

[0057] Figure 2 is a method flow chart of an embodiment of a temperature control method for a liquid-cooled energy storage system provided by the present application when the liquid-cooled energy storage system is in a charging and discharging state;

[0058] Figure 3 It is a hardware structure block diagram of an electronic device of a temperature control method of a liquid-cooled energy storage system provided in the present application;

[0059] Figure 4 It is a schematic diagram of the module structure of an embodiment of the temperature control device of the liquid-cooled energy storage system provided by the present application when the liquid-cooled energy storage system is in a static state;

[0060] Figure 5 It is a schematic diagram of the module structure of an embodiment of the temperature control device of the liquid-cooled energy storage system provided in the present application when the liquid-cooled energy storage system is in a charging and discharging state. DETAILED DESCRIPTION

[0061] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0062] The amount of heat exchange between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit is determined by the temperature difference between the battery and the coolant. When the liquid cooling unit uses a single target value for the liquid supply temperature for cooling, the temperature of the battery is not high in the initial stage of battery charging and discharging, which will lead to a small temperature difference between the battery and the coolant and a low heat exchange rate. The cooling capacity of the liquid cooling unit cannot be fully utilized. Therefore, when the ambient temperature is high or the cooling capacity of the liquid cooling unit is limited, there is a risk of battery overheating in the later stage of battery charging and discharging.

[0063] In view of the problem that the prior art cannot control the battery temperature of the battery in the energy storage system in the charging and discharging state within an ideal range when the refrigeration of the liquid cooling system is limited and the ambient temperature is high, a temperature control method for a liquid-cooled energy storage system is provided in an embodiment of the present application. Although the present application provides method operation steps or device structures as shown in the following embodiments or drawings, more or fewer operation steps or module units may be included in the method or device based on routine or no creative labor. In the steps or structures where there is no necessary causal relationship logically, the execution order of these steps or the module structure of the device is not limited to the execution order or module structure described in the embodiments of the present application and shown in the drawings. When the method or module structure is applied to an actual device or terminal product, it can be connected according to the method or module structure shown in the embodiment or drawings for sequential execution or parallel execution (for example, a parallel processor or a multi-threaded processing environment, or even a distributed processing environment).

[0064] In a liquid-cooled energy storage system, since the thermal capacity of the battery in the liquid-cooled energy storage system is relatively large, the battery can store a lot of heat during the battery charging and discharging process, and under the condition that the maximum allowable temperature of the battery is constant, the lower the initial temperature of the battery charging and discharging, the more heat the battery can store during the charging and discharging process. Therefore, when the liquid-cooled energy storage system is in a static state, a reasonable initial temperature of the battery charging and discharging can be set to ensure that the battery can absorb enough heat during the charging and discharging period. When the battery is in the charging and discharging state, the liquid supply temperature of the liquid cooling unit can be adjusted to ensure that the heat generated by the battery can be taken away by the coolant of the liquid cooling unit in time.

[0065] Specifically, Figure 1 As shown, the temperature control method of the above-mentioned liquid-cooled energy storage system may include the following steps:

[0066] S101: When the liquid-cooled energy storage system is in a static state, obtain weather data within a future preset period.

[0067] Specifically, since the cooling capacity of the liquid cooling unit in the liquid-cooled energy storage system will change with the change of ambient temperature, within a certain range, the increase in ambient temperature will cause the cooling capacity of the liquid cooling unit to decrease. Therefore, in order to accurately evaluate the cooling capacity of the liquid cooling unit in the liquid-cooled energy storage system within a preset period, it is necessary to obtain weather data within the future preset period.

[0068] Specifically, the preset cycle may be a charge and discharge cycle. In actual implementation, a suitable cycle range may be selected and set according to demand and on-site conditions, and this application does not impose any limitation on this.

[0069] S102: Determine the outdoor ambient temperature within a future preset period according to the weather data.

[0070] S103: According to the outdoor ambient temperature, obtain a change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period.

[0071] Specifically, the cooling capacity test data of the liquid cooling unit at different ambient temperatures can be first obtained; the cooling capacity test data of the liquid cooling unit at different ambient temperatures can be fitted to obtain a target fitting curve; based on the target fitting curve, the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature can be determined; and then based on the outdoor ambient temperature in a future preset period, and the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature, the change trend of the maximum cooling power of the liquid cooling unit over time in the future preset period can be determined.

[0072] S104: Determine the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time.

[0073] Specifically, after obtaining the change trend of the maximum cooling power of the liquid cooling unit over time, the average cooling power of the liquid cooling unit in the future preset period can be calculated according to the following formula:

[0074]

[0075] in, is the average cooling power of the liquid cooling unit in the future preset period, Δt is the duration of the preset period, t is time, and Q1(t) is the changing trend of the maximum cooling power of the liquid cooling unit with time t.

[0076] S105: Obtaining average heat generation power and temperature target values ​​of batteries in the liquid-cooled energy storage system.

[0077] Specifically, when the liquid-cooled energy storage system is in a static state, the initial temperature of the battery charging and discharging in the liquid-cooled energy storage system needs to be calculated through the average cooling power of the liquid cooling unit in the future preset period, the average heat generation power of the battery and the temperature target value of the battery. Because the battery temperature must be controlled at a reasonable initial temperature value before the liquid-cooled energy storage system starts charging and discharging, it is necessary to obtain the average heat generation power and temperature target value of the battery in the preset period.

[0078] S106: Determine an initial temperature target value for battery charging and discharging according to the average cooling power of the liquid cooling unit in a future preset period, the average heat generation power of the battery, and the temperature target value of the battery.

[0079] Specifically, in order to determine the initial temperature target value of battery charging and discharging, it is necessary to first obtain the total heat capacity and the total mass of the battery, and then calculate the initial temperature target value of the battery charging and discharging according to the following formula based on the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery, the temperature target value of the battery, the total heat capacity of the battery and the total mass of the battery:

[0080]

[0081] Among them, T0 is the initial temperature target value of battery charging and discharging, is the average cooling power of the liquid cooling unit in the future preset cycle, Q2 is the average heat generation power of the battery, T1 is the target temperature value of the battery, C is the total heat capacity of the battery, M is the total mass of the battery, and Δt is the duration of the preset cycle.

[0082] S107: Regulating the temperature of the battery in the liquid-cooled energy storage system according to the initial temperature target value of charging and discharging.

[0083] Through the above scheme, the cooling capacity of the liquid cooling system in a future preset period can be accurately evaluated based on the weather forecast data in the future preset period, so as to set a reasonable initial temperature for the battery in the liquid-cooled energy storage system to ensure that the battery can absorb sufficient heat during charging and discharging when the cooling capacity of the liquid cooling unit is insufficient.

[0084] Further, such as Figure 2 As shown, the implementation of the temperature control method of the above liquid-cooled energy storage system also includes:

[0085] S201: When the liquid-cooled energy storage system is in a charging and discharging state, real-time detection of the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system.

[0086] S202: Acquire a maximum theoretical cooling capacity of the current adjustment period of the liquid cooling unit according to the ambient temperature of the current adjustment period.

[0087] Specifically, the cooling capacity test data of the liquid cooling unit at different ambient temperatures can be obtained first, the cooling capacity test data of the liquid cooling unit at different ambient temperatures can be fitted to obtain a target fitting curve, and then the maximum theoretical cooling capacity of the current adjustment cycle of the above liquid cooling unit can be obtained according to the target fitting curve.

[0088] S203: Calculate a target value of the liquid supply temperature for the next adjustment cycle according to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system.

[0089] Specifically, in order to calculate the target value of the liquid supply temperature in the next adjustment cycle, it is necessary to obtain the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit; then, according to the maximum theoretical cooling capacity of the current adjustment cycle, the battery temperature of the liquid-cooled energy storage system, and the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit, the target value of the liquid supply temperature in the next adjustment cycle is calculated according to the following formula:

[0090] T' out =T bat -Q max ×R

[0091] Among them, T' out is the target value of the liquid supply temperature in the next adjustment cycle, T bat is the battery temperature of the liquid-cooled energy storage system, Q max is the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment cycle, and R is the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit.

[0092] S204: In the next adjustment cycle, the liquid cooling unit is controlled according to the calculated target value of the liquid supply temperature in the next adjustment cycle.

[0093] Through the above scheme, the liquid supply temperature of the liquid cooling unit in the liquid-cooled energy storage system can be dynamically adjusted according to the real-time detection of the outdoor ambient temperature and the battery temperature of the liquid-cooled energy storage system, so that the liquid cooling unit can operate at the maximum cooling capacity to cool the batteries in the liquid-cooled energy storage system and avoid overheating of the batteries during charging and discharging.

[0094] The above method is described below in conjunction with a specific embodiment. However, it should be noted that this specific embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application.

[0095] In this example, considering the problem that the allowable design space of the liquid cooling system in the prior art is limited and the ambient temperature is high, it is impossible to control the temperature of the battery in the energy storage system during charging and discharging within an ideal range, a temperature control method for a liquid-cooled energy storage system is proposed. According to the method, the initial temperature of the battery charging and discharging can be determined according to the average cooling power, the average heat generation power of the battery and the target temperature of the battery in a future preset cycle, and the temperature of the battery in the liquid-cooled energy storage system can be regulated according to the initial temperature. According to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system, the target liquid supply temperature of the next adjustment cycle is determined, and in the next adjustment cycle, the liquid cooling unit is controlled according to the target liquid supply temperature, so as to achieve the purpose of dynamically adjusting the initial temperature of the battery charging and discharging of the liquid-cooled energy storage system and the liquid supply temperature of the liquid cooling unit, and accurately controlling the battery temperature to always be within the ideal range.

[0096] In order to accurately determine the initial temperature target value of battery charging and discharging, it is necessary to determine the average cooling power of the liquid cooling unit in the future preset period. Specifically, the outdoor ambient temperature in the future preset period can be determined based on the weather data in the future preset period; then, based on the outdoor ambient temperature, the maximum cooling power of the liquid cooling unit of the liquid-cooled energy storage system in the future preset period can be obtained over time; based on the maximum cooling power over time, the average cooling power of the liquid cooling unit in the future preset period can be determined.

[0097] Specifically, the variation trend of the maximum cooling power of the liquid cooling unit of the liquid-cooled energy storage system over time in a future preset period is obtained as follows: first, the cooling capacity test data of the liquid cooling unit at different ambient temperatures are obtained, and then the cooling capacity test data of the liquid cooling unit at different ambient temperatures are fitted to obtain a target fitting curve; according to the target fitting curve, the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature is determined; finally, according to the outdoor ambient temperature in the future preset period, and the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature, the variation trend of the maximum cooling power of the liquid cooling unit over time in the future preset period is determined.

[0098] Specifically, after obtaining the change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in the future preset period, the average cooling power of the liquid cooling unit in the future preset period can be calculated according to the following formula:

[0099]

[0100] in, is the average cooling power of the liquid cooling unit in the future preset period, Δt is the duration of the preset period, t is time, and Q1(t) is the changing trend of the maximum cooling power of the liquid cooling unit with time t.

[0101] Specifically, when the liquid-cooled energy storage system is in a static state, the initial temperature of the battery charging and discharging in the liquid-cooled energy storage system is calculated by the average cooling power of the liquid cooling unit in a future preset period, the average heat generation power of the battery, and the temperature target value of the battery. Therefore, it is necessary to obtain the average heat generation power and temperature target value of the battery in the preset period.

[0102] In order to accurately determine the initial temperature target value of battery charging and discharging, it is also necessary to obtain the total heat capacity and total mass of the battery, and then determine the initial temperature target value of battery charging and discharging according to the following formula based on the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery and the temperature target value of the battery:

[0103]

[0104] Among them, T0 is the initial temperature target value of battery charging and discharging, is the average cooling power of the liquid cooling unit in the future preset cycle, Q2 is the average heat generation power of the battery, T1 is the target temperature value of the battery, C is the total heat capacity of the battery, M is the total mass of the battery, and Δt is the duration of the preset cycle.

[0105] After determining the initial temperature target value of battery charging and discharging, the temperature of the battery in the liquid-cooled energy storage system can be regulated according to the initial temperature target value of charging and discharging to achieve dynamic adjustment of the initial temperature of the battery charging and discharging.

[0106] Furthermore, in order to dynamically adjust the liquid supply temperature of the liquid cooling unit when the liquid-cooled energy storage system is in the charging and discharging state, it is necessary to detect the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system in real time, and obtain the maximum theoretical cooling capacity of the current adjustment cycle of the liquid cooling unit based on the ambient temperature of the current adjustment cycle and the fitting curve of the cooling capacity test data of the liquid cooling unit at different ambient temperatures. Then, based on the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system, calculate the target value of the liquid supply temperature for the next adjustment cycle.

[0107] Specifically, the target value of the liquid supply temperature in the next adjustment cycle can be calculated according to the following formula:

[0108] T' out =T bat -Q max ×R

[0109] Among them, T' out is the target value of the liquid supply temperature in the next adjustment cycle, T bat is the battery temperature of the liquid-cooled energy storage system, Q max is the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment cycle, and R is the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit.

[0110] After the target value of the liquid supply temperature for the next adjustment cycle is calculated, the liquid cooling unit cools the battery according to the target value of the liquid supply temperature in the next adjustment cycle to achieve dynamic adjustment of the liquid supply temperature of the liquid cooling unit.

[0111] In the above example, the initial temperature of battery charging and discharging is determined based on the average cooling power, the average heat generation power of the battery and the target temperature of the battery in the future preset cycle, and the temperature of the battery in the liquid-cooled energy storage system is regulated according to the initial temperature. The target liquid supply temperature of the next adjustment cycle is determined based on the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system. In the next adjustment cycle, the liquid cooling unit is controlled according to the target liquid supply temperature. This can achieve the purpose of dynamically adjusting the initial temperature of battery charging and discharging of the liquid-cooled energy storage system and the liquid supply temperature of the liquid cooling unit, and accurately controlling the battery temperature to always be within the ideal range.

[0112] The method embodiments provided in the above embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on an electronic device as an example, Figure 3 This is a hardware structure block diagram of an electronic device for a temperature control method of a liquid-cooled energy storage system provided in this application. Figure 3 As shown, the electronic device 10 may include one or more (only one is shown in the figure) processors 02 (the processor 02 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 04 for storing data, and a transmission module 06 for communication functions. It can be understood by those skilled in the art that Figure 3 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 3 More or fewer components as shown, or with Figure 3 Different configurations are shown.

[0113] The memory 04 can be used to store software programs and modules of application software, such as program instructions / modules corresponding to the temperature control method of the liquid-cooled energy storage system in the embodiment of the present application. The processor 02 executes various functional applications and data processing by running the software programs and modules stored in the memory 04, that is, the temperature control method of the liquid-cooled energy storage system of the above-mentioned application is realized. The memory 04 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 04 may further include a memory remotely arranged relative to the processor 02, and these remote memories may be connected to the electronic device 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0114] The transmission module 06 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the electronic device 10. In one example, the transmission module 06 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission module 06 can be a radio frequency (Radio Frequency, RF) module, which is used to communicate with the Internet wirelessly.

[0115] At the software level, the temperature control device of the above liquid-cooled energy storage system can be Figure 4 As shown, including:

[0116] The first acquisition module 401 is used to acquire weather data within a future preset period when the liquid-cooled energy storage system is in a static state;

[0117] A first determination module 402 is used to determine the outdoor environment temperature within a future preset period according to the weather data;

[0118] The second acquisition module 403 is used to obtain the change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period according to the outdoor ambient temperature;

[0119] The second determination module 404 is used to determine the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time;

[0120] The third acquisition module 405 is used to obtain the average heat generation power and temperature target value of the battery in the liquid-cooled energy storage system;

[0121] The third determination module 406 is used to determine the initial temperature target value of the battery charging and discharging according to the average cooling power of the liquid cooling unit in a future preset period, the average heat generation power of the battery and the temperature target value of the battery;

[0122] The first control module 407 is used to control the temperature of the battery in the liquid-cooled energy storage system according to the initial temperature target value of the charge and discharge.

[0123] In one embodiment, the second acquisition module 403 first acquires the cooling capacity test data of the liquid cooling unit at different ambient temperatures, and then fits the cooling capacity test data of the liquid cooling unit at different ambient temperatures to obtain a target fitting curve; based on the target fitting curve, the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature can be determined; finally, based on the outdoor ambient temperature in a future preset period, and the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature, the change trend of the maximum cooling power of the liquid cooling unit over time in the future preset period is determined.

[0124] In one embodiment, the second determination module 404 may be specifically used to determine the average cooling power of the liquid cooling unit in a future preset period according to the following formula:

[0125]

[0126] in, is the average cooling power of the liquid cooling unit in the future preset period, Δt is the duration of the preset period, t is time, and Q1(t) is the changing trend of the maximum cooling power of the liquid cooling unit with time t.

[0127] In one embodiment, the third determination module 406 may be specifically configured to determine the initial temperature target value of the battery charging and discharging according to the following formula:

[0128]

[0129] Among them, T0 is the initial temperature target value of battery charging and discharging, is the average cooling power of the liquid cooling unit in the future preset cycle, Q2 is the average heat generation power of the battery, T1 is the target temperature value of the battery, C is the total heat capacity of the battery, M is the total mass of the battery, and Δt is the duration of the preset cycle.

[0130] In one embodiment, if Figure 5 As shown, the temperature control device of the above-mentioned liquid-cooled energy storage system also includes:

[0131] The detection module 501 is used to detect the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system in real time when the liquid-cooled energy storage system is in a charging and discharging state;

[0132] A fourth acquisition module 502, configured to acquire a maximum theoretical cooling capacity of a current adjustment period of the liquid cooling unit according to the ambient temperature of the current adjustment period;

[0133] A calculation module 503, used to calculate a target value of the liquid supply temperature in the next adjustment cycle according to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system;

[0134] The second control module 504 is used to control the cooling of the liquid cooling unit in the next adjustment cycle according to the calculated target value of the liquid supply temperature of the next adjustment cycle.

[0135] In one embodiment, the calculation module 503 may be specifically configured to calculate the target value of the liquid supply temperature of the next adjustment cycle according to the following formula:

[0136] T' out =T bat -Q max ×R

[0137] Among them, T' out is the target value of the liquid supply temperature in the next adjustment cycle, T bat is the battery temperature of the liquid-cooled energy storage system, Q max is the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment cycle, and R is the thermal resistance between the coolant of the battery liquid cooling unit of the liquid-cooled energy storage system.

[0138] The embodiments of the present application also provide a specific implementation of an electronic device capable of implementing all the steps in the temperature control method of the liquid-cooled energy storage system in the above embodiments, wherein the electronic device specifically includes the following contents: a processor, a memory, a communication interface, and a bus; wherein the processor, the memory, and the communication interface communicate with each other through the bus; the processor is used to call a computer program in the memory, and when the processor executes the computer program, all the steps in the temperature control method of the liquid-cooled energy storage system in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0139] Step 1: When the liquid-cooled energy storage system is in a static state, obtain weather data within a future preset period;

[0140] Step 2: Determine the outdoor ambient temperature within a future preset period based on the weather data;

[0141] Step 3: According to the outdoor ambient temperature, obtain the change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period;

[0142] Step 4: Determine the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time;

[0143] Step 5: Obtaining the average heat generation power and temperature target value of the battery in the liquid-cooled energy storage system;

[0144] Step 6: Determine the initial temperature target value for battery charging and discharging based on the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery, and the temperature target value of the battery;

[0145] Step 7: According to the initial temperature target value of the charge and discharge, the temperature of the battery in the liquid-cooled energy storage system is regulated.

[0146] Step 8: When the liquid-cooled energy storage system is in a charging and discharging state, the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system are detected in real time;

[0147] Step 9: According to the ambient temperature of the current adjustment period, obtain the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment period;

[0148] Step 10: Calculate the target value of the liquid supply temperature for the next adjustment cycle according to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system;

[0149] Step 11: In the next adjustment cycle, the liquid cooling unit is controlled according to the calculated target value of the liquid supply temperature in the next adjustment cycle.

[0150] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps in the temperature control method of the liquid-cooled energy storage system in the above embodiments. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps in the temperature control method of the liquid-cooled energy storage system in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0151] Step 1: When the liquid-cooled energy storage system is in a static state, obtain weather data within a future preset period;

[0152] Step 2: Determine the outdoor ambient temperature within a future preset period based on the weather data;

[0153] Step 3: According to the outdoor ambient temperature, obtain the change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period;

[0154] Step 4: Determine the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time;

[0155] Step 5: Obtaining the average heat generation power and temperature target value of the battery in the liquid-cooled energy storage system;

[0156] Step 6: Determine the initial temperature target value for battery charging and discharging based on the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery, and the temperature target value of the battery;

[0157] Step 7: According to the initial temperature target value of the charge and discharge, the temperature of the battery in the liquid-cooled energy storage system is regulated.

[0158] Step 8: When the liquid-cooled energy storage system is in a charging and discharging state, the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system are detected in real time;

[0159] Step 9: According to the ambient temperature of the current adjustment period, obtain the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment period;

[0160] Step 10: Calculate the target value of the liquid supply temperature for the next adjustment cycle according to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system;

[0161] Step 11: In the next adjustment cycle, the liquid cooling unit is controlled according to the calculated target value of the liquid supply temperature in the next adjustment cycle.

[0162] From the above description, it can be seen that the embodiment of the present application obtains weather data within a future preset period when the liquid-cooled energy storage system is in a static state; determines the outdoor ambient temperature within a future preset period based on the weather data; obtains the maximum cooling power of the liquid cooling unit of the liquid-cooled energy storage system in the future preset period based on the outdoor ambient temperature; determines the average cooling power of the liquid cooling unit in the future preset period based on the maximum cooling power over time; obtains the average heat generation power and temperature target value of the battery in the liquid-cooled energy storage system; determines the initial temperature target value of battery charging and discharging based on the average cooling power of the liquid cooling unit in the future preset period, the average heat generation power of the battery and the temperature target value of the battery. When the liquid-cooled energy storage system is in a charging and discharging state, the ambient temperature of the current adjustment period and the battery temperature of the liquid-cooled energy storage system are detected in real time; the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment period is obtained based on the ambient temperature of the current adjustment period; the target value of the liquid supply temperature for the next adjustment period is calculated based on the maximum theoretical cooling capacity of the current adjustment period and the battery temperature of the liquid-cooled energy storage system. The above scheme can achieve the purpose of dynamically adjusting the initial charging and discharging temperature of the battery of the liquid-cooled energy storage system and the liquid supply temperature of the liquid cooling unit, ensuring that the battery temperature when the battery is in the charging and discharging state is controlled within an ideal range.

[0163] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0164] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0165] Although the present application provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0166] Although the present specification embodiment provides the method operation steps as described in the embodiment or flow chart, more or less operation steps may be included based on conventional or non-creative means. The order of steps listed in the embodiment is only one way in the order of execution of many steps, and does not represent a unique execution order. When the device or terminal product in practice is executed, it can be executed in sequence or in parallel (such as a parallel processor or a multi-threaded processing environment, or even a distributed data processing environment) according to the method shown in the embodiment or the accompanying drawings. The term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or equipment including a series of elements not only includes those elements, but also includes other elements not clearly listed, or also includes elements inherent to such process, method, product or equipment. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or equipment including the elements.

[0167] For the convenience of description, the above devices are described in various modules according to their functions. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the module implementing the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0168] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0169] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0170] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, the embodiments of this specification may take the form of complete hardware embodiments, complete software embodiments or embodiments combining software and hardware. Moreover, the embodiments of this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0171] The present specification embodiments may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present specification embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0172] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0173] The above is only an example of the embodiment of the present specification and is not intended to limit the embodiment of the present specification. For those skilled in the art, the embodiment of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment of the present specification shall be included in the scope of the claims of the embodiment of the present specification.

Claims

1. A temperature control method for a liquid-cooled energy storage system, characterized in that: include: When the liquid-cooled energy storage system is in a static state, obtain weather data within a preset period in the future; Determine the outdoor ambient temperature within a future preset period based on the weather data; According to the outdoor ambient temperature, obtaining a change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period; Determine the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time; Obtaining an average heat generation power and a temperature target value of a battery in the liquid-cooled energy storage system; Determine the initial temperature target value of the battery charging and discharging according to the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery and the temperature target value of the battery; The temperature of the battery in the liquid-cooled energy storage system is regulated according to the initial temperature target value of charging and discharging.

2. The method according to claim 1, characterized in that According to the outdoor ambient temperature, the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system is obtained over time in a future preset period, including: Obtaining cooling capacity test data of the liquid cooling unit at different ambient temperatures; Fitting the cooling capacity test data of the liquid cooling unit at different ambient temperatures to obtain a target fitting curve; Determining the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature according to the target fitting curve; According to the outdoor ambient temperature in a future preset period, and the relationship between the maximum cooling power of the liquid cooling unit and the ambient temperature, the change trend of the maximum cooling power of the liquid cooling unit over time in the future preset period is determined.

3. The method according to claim 1, characterized in that: According to the variation trend of the maximum cooling power over time, the average cooling power of the liquid cooling unit in a future preset period is determined, including: The average cooling power of the liquid cooling unit in the future preset period is calculated according to the following formula: in, is the average cooling power of the liquid cooling unit in the future preset period, Δt is the duration of the preset period, t is time, and Q1(t) is the changing trend of the maximum cooling power of the liquid cooling unit with time t.

4. The method according to claim 1, characterized in that: According to the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery and the temperature target value of the battery, the initial temperature target value of the battery charging and discharging is determined, including: Get the total heat capacity and total mass of the battery; According to the average cooling power of the liquid cooling unit in the future preset cycle, the average heat generation power of the battery, the temperature target value of the battery, the total heat capacity of the battery and the total mass of the battery, the initial temperature target value of the battery charging and discharging is calculated according to the following formula: Among them, T0 is the initial temperature target value of battery charging and discharging, is the average cooling power of the liquid cooling unit in the future preset cycle, Q2 is the average heat generation power of the battery, T1 is the target temperature value of the battery, C is the total heat capacity of the battery, M is the total mass of the battery, and Δt is the duration of the preset cycle.

5. The method according to claim 1, characterized in that Also includes: When the liquid-cooled energy storage system is in a charging and discharging state, the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system are detected in real time; According to the ambient temperature of the current adjustment period, obtaining the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment period; Calculating a target value of the liquid supply temperature for the next adjustment cycle according to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system; In the next adjustment cycle, the liquid cooling unit is controlled to cool according to the calculated target value of the liquid supply temperature in the next adjustment cycle.

6. The method according to claim 5, characterized in that According to the maximum theoretical cooling capacity of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system, a target value of the liquid supply temperature of the next adjustment cycle is calculated, including: Obtain the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit; According to the maximum theoretical cooling capacity of the current adjustment cycle, the battery temperature of the liquid-cooled energy storage system, and the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit, the target value of the liquid supply temperature of the next adjustment cycle is calculated according to the following formula: T o ' ut =T bat -Q max ×R Among them, T o ' ut is the target value of the liquid supply temperature in the next adjustment cycle, T bat is the battery temperature of the liquid-cooled energy storage system, Q max is the maximum theoretical cooling capacity of the liquid cooling unit in the current adjustment cycle, and R is the thermal resistance between the battery of the liquid-cooled energy storage system and the coolant of the liquid cooling unit.

7. A temperature control device for a liquid-cooled energy storage system, characterized in that: include: The first acquisition module is used to acquire weather data within a future preset period when the liquid-cooled energy storage system is in a static state; A first determination module, used to determine the outdoor ambient temperature within a future preset period according to the weather data; A second acquisition module is used to obtain a change trend of the maximum cooling power of the liquid cooling unit of the liquid cooling energy storage system over time in a future preset period according to the outdoor ambient temperature; A second determination module is used to determine the average cooling power of the liquid cooling unit in a future preset period according to the change trend of the maximum cooling power over time; A third acquisition module is used to obtain the average heat generation power and temperature target value of the battery in the liquid-cooled energy storage system; The third determination module is used to determine the initial temperature target value of the battery charging and discharging according to the average cooling power of the liquid cooling unit in a future preset period, the average heat generation power of the battery and the temperature target value of the battery; The first control module is used to control the temperature of the battery in the liquid-cooled energy storage system according to the initial temperature target value of the charging and discharging.

8. The device according to claim 7, characterized in that Also includes: A detection module, used for detecting the ambient temperature of the current adjustment cycle and the battery temperature of the liquid-cooled energy storage system in real time when the liquid-cooled energy storage system is in a charging and discharging state; A fourth acquisition module, used for acquiring the maximum theoretical cooling capacity of the current adjustment period of the liquid cooling unit according to the ambient temperature of the current adjustment period; A calculation module, used to calculate a target value of a liquid supply temperature in a next adjustment cycle according to a maximum theoretical cooling capacity of the current adjustment cycle and a battery temperature of the liquid-cooled energy storage system; The second control module is used to perform refrigeration control on the liquid cooling unit in the next adjustment cycle according to the calculated target value of the liquid supply temperature in the next adjustment cycle.

9. An electronic device comprising a processor and a memory for storing instructions executable by the processor, characterized in that: When the processor executes the instructions, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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